Radiative lifetimes of superradiant populated Ba Rydberg levels

Duncan Tate, Drew Branden, Tamás Juhász +5 more

M. I. Chibisov, R.K. Janev, I. I. Fabrikant +2 more

Ya. F. Verolainen

M Hugon, F. Gounand, P. R. Fournier

Measurements have been made of the natural radiative lifetimes of rubidium highly excited (9<or=n<or=21) F states. The nF states are populated using super-radiant cascading effects in rubidium Rydberg levels. Lifetimes calculated by the Coulomb approximation method agree with our experimental data.

L. Chen, T. Bolzinger, M. Chéret +4 more

We report the observation of unusual doubly excited states of barium: Ba (5dj, 21c). One of the valence electrons of Ba is prepared in an oriented circular Rydberg state (n = 21, l = m = 20, denoted 21c) by the adiabatic crossed-fields method. The other electron is excited to a 6pj state which decays radiatively to a 5dj metastable level. The measured autoionization lifetime of Ba (5d5/2, 21c) is T ~ 1 μ s , whereas for Ba (5d3/2, 21c), τ is estimated to be longer than 400 μs. This very large difference of lifetimes between the fine-structure states of the inner electron has been analysed.

J Marek, Pamela N. Münster

The lifetimes of the Rb atomic levels n 2 S, n 2 P, n 2 D up to quantum number n=12 and of the 10, 11, 12 2 F states were measured using pulsed dye laser excitation and a single-photon counting technique. Population by superradiance was applied for the excitation of the certain levels. Some data were determined by the measurement in Rb-rare-gas systems. The present results have been compared with the theoretical and experimental data given by different authors.